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Cheap flights from Helena to London from $1,275

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Helena to London departing on 6/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Helena to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
2:20 pm - 9:40 am
HLN
-
LHR
12h 20m
1 stop
United Airlines Logo
2:50 pm - 9:20 pm
LHR
-
HLN
13h 30m
1 stop
$1,275United Airlines
Thu, Jun 11 - Wed, Jun 17
United Airlines Logo
2:20 pm - 8:40 pm
HLN
-
LHR
23h 20m
2 stops
United Airlines Logo
2:50 pm - 9:20 pm
LHR
-
HLN
13h 30m
1 stop
$1,280United Airlines
Thu, Jun 11 - Wed, Jun 17
United Airlines Logo
6:15 am - 10:40 am
HLN
-
LHR
21h 25m
2 stops
United Airlines Logo
2:05 pm - 9:20 pm
LHR
-
HLN
38h 15m
2 stops
$1,399United Airlines
Tue, Jun 16 - Mon, Jun 29
Alaska Airlines Logo
5:09 pm - 3:05 pm
HLN
-
LHR
14h 56m
1 stop
Alaska Airlines Logo
5:00 pm - 4:32 pm
LHR
-
HLN
30h 32m
1 stop
$1,421Alaska Airlines
Tue, Jun 16 - Mon, Jun 29
Alaska Airlines Logo
5:09 pm - 3:05 pm
HLN
-
LHR
14h 56m
1 stop
Alaska Airlines Logo
5:00 pm - 4:32 pm
LHR
-
HLN
30h 32m
1 stop
$1,621Alaska Airlines
Tue, Jun 16 - Mon, Jun 29
United Airlines Logo
6:15 am - 6:30 am
HLN
-
LHR
17h 15m
2 stops
United Airlines Logo
11:25 am - 9:20 pm
LHR
-
HLN
16h 55m
1 stop
$1,688United Airlines
Tue, Jun 16 - Mon, Jun 29

United Airlines flights from Helena to London

Our best United Airlines deals on Helena to London flight tickets
United Airlines
Jun 11
HLN2:20 pmHelena
12h 20m
1 stop
LHR9:40 amLondon Heathrow
Jun 17
LHR2:50 pmLondon Heathrow
13h 30m
1 stop
HLN9:20 pmHelena
$1,275
United Airlines
Jun 11
HLN2:20 pmHelena
23h 20m
2 stops
LHR8:40 pmLondon Heathrow
Jun 17
LHR2:50 pmLondon Heathrow
13h 30m
1 stop
HLN9:20 pmHelena
$1,280
United Airlines
Jun 16
HLN6:15 amHelena
21h 25m
2 stops
LHR10:40 amLondon Heathrow
Jun 29
LHR2:05 pmLondon Heathrow
38h 15m
2 stops
HLN9:20 pmHelena
$1,399

Alaska Airlines flights from Helena to London

Our best Alaska Airlines deals on Helena to London flight tickets
Alaska Airlines
Jun 16
HLN5:09 pmHelena
14h 56m
1 stop
LHR3:05 pmLondon Heathrow
Jun 29
LHR5:00 pmLondon Heathrow
30h 32m
1 stop
HLN4:32 pmHelena
$1,421
Alaska Airlines
Jun 16
HLN5:09 pmHelena
14h 56m
1 stop
LHR3:05 pmLondon Heathrow
Jun 29
LHR5:00 pmLondon Heathrow
30h 32m
1 stop
HLN4:32 pmHelena
$1,621

momondo Fare Finder

 
Customize your flight search to find flights from Helena to London that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated May 13, 2026.
Use the filters below to find and compare flights from Helena to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

HelenaLondon

HLN - LHR

HLNLHR

Helena

Thu 6/11

2:20 pm-9:40 am

1 stop12h 20m

London Heathrow

Wed 6/17

2:50 pm-9:20 pm

1 stop13h 30m

$1,275

HelenaLondon

HLN - LHR

HLNLHR

Helena

Thu 6/11

2:20 pm-8:40 pm

2 stops23h 20m

London Heathrow

Wed 6/17

2:50 pm-9:20 pm

1 stop13h 30m

$1,280

HelenaLondon

HLN - LHR

HLNLHR

Helena

Tue 6/16

6:15 am-10:40 am

2 stops21h 25m

London Heathrow

Mon 6/29

2:05 pm-9:20 pm

2 stops38h 15m

$1,399

HelenaLondon

HLN - LHR

HLNLHR

Helena

Tue 6/16

5:09 pm-3:05 pm

1 stop14h 56m

London Heathrow

Mon 6/29

5:00 pm-4:32 pm

1 stop30h 32m

$1,421

HelenaLondon

HLN - LHR

HLNLHR

Helena

Tue 6/16

5:09 pm-3:05 pm

1 stop14h 56m

London Heathrow

Mon 6/29

5:00 pm-4:32 pm

1 stop30h 32m

$1,621

HelenaLondon

HLN - LHR

HLNLHR

Helena

Tue 6/16

6:15 am-6:30 am

2 stops17h 15m

London Heathrow

Mon 6/29

11:25 am-9:20 pm

1 stop16h 55m

$1,688

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to London from

How to get the cheapest flight ticket from Helena to London

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Which airport is the most popular layover for flights between Helena and London?

Percentage of 1-stop return trips between Helena and London selected by momondo users, with the same layover airport each way, over the last 12 months.

Denver (DEN) was the most common stop: 67% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from Helena to London?

Average price of 1-stop round-trip flights from Helena to London, with the same layover airport on both legs, clicked by momondo users over the past 12 months.

Flights via Salt Lake City (SLC) offer the lowest average round-trip price of $589.

Which layover airport has the shortest travel time from Helena to London?

Average total travel time for 1-stop one-way flights from Helena to London, grouped by layover airport, based on momondo user clicks from the past 12 months.

Flights connecting via Denver (DEN) have the shortest average one-way travel time: 12h 00m.

Which layover airport has the shortest connection time from Helena to London?

Average connection time for 1-stop one-way flights from Helena to London, grouped by layover airport, based on momondo user clicks over the last 12 months.

Denver (DEN) has the shortest average layover time for this route: 1h 15m.

When to book flights from Helena to London

Are you open to changing your travel dates? Check out the ideal times to fly from Helena to London according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Helena to London (HLN to LON) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Helena to London

Fastest flight time

20h 37m

Direct flights

None
The fastest flight from Helena to London takes 20h 37m
There are no direct flights from Helena to London. There are no popular flight routes from Helena to London.
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Frequently asked questions about flying from Helena to London

  • How far is Helena to London by plane?

    Helena and London are 4547.6 mi apart from one another. In terms of flight time, this usually takes a little over 20h 37m.

  • When did momondo last update prices for flights from Helena Airport to London?

    Prices for flights from Helena Airport to London were last updated today.

  • How old do you have to be to fly from Helena Airport to London?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Helena Airport to London.

  • What documentation or ID do you need to fly to London?

    The necessary travel and health documents for your London trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Helena to London?

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Hounslow
Gatwick
Milton Keynes
Dover
Luton
Hayes
Crawley
Wembley
Slough
Croydon
Stansted
Watford
Harrow
Brentwood
Dartford
Cobham
Folkestone
Romford
Uxbridge
Guildford

Why use momondo?

Why should I use momondo to find a flight deal from Helena to London?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Helena to London. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Helena to London with flexible booking policies on momondo?

Yes. All flights to London from Helena on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Helena to London?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Helena to London.

I’m not ready to book a flight from Helena to London right now. Can momondo alert me if prices change?

If you are simply researching potential flights to London, momondo offers a useful price alert feature which will track prices for flights to London from Helena and alert you when they change.

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Find better results for your trip to the United Kingdom

Fly into one of these airports located in London

Airports listed have a maximum distance of 35.6 mi from London
London City Airport
London Gatwick Airport
London Heathrow Airport
London Luton Airport
London Southend Airport
London Stansted Airport